The calculated distance (air line) between Lomas de Sargentillo and Riobamba is approximately 100 miles respectively 161 kilometers.
By car or train, the actual journey to Riobamba is certainly longer, as only the direct route (as the crow flies) between Lomas de Sargentillo and Riobamba has been calculated here.
Air line (approximately)
161 kilometers
87 nautical miles